Torch



' l l 1,63%-265 June 21 1927" G. A. MORRISON TORCH Filed July 5, 1926 2 Sheets-Sheet 1 June 21 1927. A 1,633,265 l G. A. MORRISON TORCH Filed July 3. 1926 2 Sheets-Sheet 2 Patented June 21, 1927.

unirse STATES 1,633,265 PATENT ePrice.

GEORGE A. MORRISON, OF PARK RIDGE, ILLINOIS, ASSIGNOR TO TORCHl/VELD EQUIP- MENT CO., F CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE.

TORCH.

Application filed July 3,

My invention relates, more particularly, though not exclusively, to torches of the socalled oxyacetylene type and my objects, generally stated, are to so 'improve upon prior struciures as to simplify them, render them more readily haiulled, and to ensure against leakage of the More specifically stated my object is to provide improved valve-controlling means, more particularly, though not exclusively, for use in connection with the valves of' torches, which shall be of novel `and simple construction and by which the valve may be readily manipulated; and other objects as will be manifest from the following description.

Ylieferring to the accompanying drawings :n

Figure 1 is a view in side elevation of a cutting torch of the oxyacetylene type in which my improvements are incorporated. Figure 2 is anenlarged view in side elevation of the handle end of the torch, the shell being sectioned to disclose interior details. Figure 3 is a section taken at the line 3 on Figs. 1 and 2 and viewed in the direction of the arrows.` Figure 4 is a sectional.diagrammatic developed view of a portion of the torch, illustrating the various valve-controlled gas passages at the inlet end of the torch; andvFigure 5 a section taken at the line 5 on Fig. 2 and viewed in the direction of the arrow.

The particular illustrated construction of torch in connection with which Iv have chosen to illustrate my improvements, comprises a body portion equipped with pipe fittings 11 and 12 for connection, respectively, with supplies of oxygen and acetylene under pressure, vthe pipe 12 for the acetylene, being provided with a valve 13 shown as of the needle type for regulating the flow of acetylene therethrough and into the member 10. The body 10 at its forward end connects with pipes 14, 15 and 16, the pipe 1f' being for high pressure oxygen, the pipe lfor acetylene and the pipe 16 for low pressure oxygen.

The body 10 contains a bore 17 which communicates at one end with the pipe fitting 12 and at its opposite endwith the pipe 15. rllhe body 10 also contains a bore 18 which communicates at one end with' the pipe fitting 11 and opens at its opposite end into a valve chamber 19 containing a needle 1926. Serial No. 120,418.

valve 2O controlling through the bore 18; the chamber 19 openingk into a bore 19d which, in turn, opens intoja valve chamber 21 which latter communicates with one end of a bore 22 the opposite end of which communicates with the pipe 16, the valve chamber 21 containing a reciprocable valve 23 operating to prevent back pressure, should such occur in the, bore 22, from entering the bore 18. The body 10 also contains bore 24 communicating at one end with the pipe fitting 11 and opening at its other end into a valve chamber 25r in the'body 10 which latter communicates by a bore 2G with one end of a bore 27 the opposite end of which opens into the pipe 14. The chamber 25 contains a reciprocable` valve 28 controlling communication between the bore 24 and the bore 27, this valve being controlled by a rod 29 which extends lengthwise through the bore 26 and outwardly through a stuffing box 30 secured in the body 10.

As clearly shown in Fig. 5 the passages 18 and 24, where they open into the socket in which the fitting 11 Yis located, are separated by a knife-edgewall, represented at 100, whereby the low-pressure bore 1S, which supplies oxygen to the low pressure pipe 1G, is prevented from becoming starved of oxygen whcnthe vvalve 28 controlling the flow of oxygen to the high pressure pipe 14 is opened. Y

The valves 23 and 28 are of the same construction, each at the end thereof at which the liow of oxygenv it engages withthe cooperating seat being `formed to provide a relatively thin flexible annular portion 31 which, in the seating of the valve in the valve seat, deforme to precisely conform with the inner surface of the valve seat and produce a gas-tight joint, the valve seats for these two valves being represented at 32 and 33, respectively, and Haringoutwardly toward the respective valves, preferably upon a radius as shown and of such diameteras to receive the ends 31 of' these valves within the space provided by these flaring portions, whereby as the valves are crowded against the flaring surfaces of th-e seats the deformation of the portions 31 as, and for the purpose, stated, is effected.

The portions 31 of these valves may bev formed, as shown, by recessing the ends of the valves as represented at 34, with their outer surfaces preferably tapering as shown,

these valves being made ot any suitable material, having such characteristics that it will d-eform as stated, as for example bronze. Both of these valves are shown as springpressedl toward the seats with which they respectively cooperate, these springs being indicated at 35 and shown as extending into sockets 36 in the valves and into sockets 37 in plugs o8 screwed into openings 39 in the. body 10. rl`he valve 28, bein` a back-pressure valve, closes in the direction ot backpressure in the bore 22, or in other words, in opposition to the'normal low of the gas through the body 10, and back-pressure generated in the bore 22 and entering the chainber '21 behind the valve 23 operates to forciblycrowd this valve against the. seat 32. rl'he valve 28 closes in the direction ot the iow of oxygen through the bore 2st, the oxygen. entering the valve chamber' 25 and by exerting its pressure against the rear end ot the valve 28 normally crowds the latter into close engagement with the seat 33. rEhus when the torch is used for welding purposes -acetylene normally i'lows through the pipe itting. 12 and bore 17 to pipe 15, and oxygen iiows throughthe pipe-fitting 11 and bore 18, thence past the valve 23 and into bore 22,. to pipe-16. thevalves 13and 2O being set tosupply. to thepipesll and 16 the acet lene and oxygen in the desired proportions. lVhen it is vdesired to use the torch as a cutting torch, a high pressureflow ot oxygen is suppliedto t-he pipezllhby opening the valve. 28.

The pipes 14, 15. and 16 extend through openings in a spacer ,disk 40, the pipe 16 screwing into. a .fitting 41 into which the rear end .or a mixing chamberdevice 12 is screwed,.the chamber inthis. device communicating with thepipes and 16. The 'forward endet the mixer device .4t2 .has screw-threaded engagement, between its ends, .with a-p-pi-pe-inember .47. It may .be here. stated that this .mixer-device serves to mix lthe Voxygen and acetylene supplied vthereto through. the pipes 15 and 16 Jfor .delivery to the Vpipe member 47 beyond the mixer.

rihe pipe47. extends intoand is connected at its forward end, witha coupling sleeve 51 which. opens into a pipe (not shown) the forward end of which communicates with a head55 opening into the burner tip 57, the mixed gasesdischarging from .the head 55 into. and through the burner tip.

To prevent overheating ot the `torch in advance ot the Amixing chamber l provide a pipe 59 which extends between the litting 51 and the head` 55 and surrounds the pipe therebetween in spaced relation thereto, the pipe 59 being suitably perforated at intervals, as i'or example as represented at 61, to permit oi the circulation ot air through the lchamber (not shown) between the pipe 59 f position. highest part, represented generally at 75,

vcndfwith an angle pipe -seetion62 which opens intothe central passage (not shown) ot the burner-tip 57 and through which high-pressure oxygen is supplied to the .burner-tip, under the control of the operator when a flame necessary for producing a cut ting operation is to bedproduced at the. burner-tip, the supply of the'hiO'h-pressure oxygen to the pipe 14 being` eli'ected by opening the valve 28 by shitting therod'29 to the lei-'t in Figs. 2 and et.

rlhe means for manually controlling the position of the valve 28 comprises a lever. 64 extending between, and pivotally connected with, the .arms 65 and .66 of a bracket-member secured to the pipe 16 land containing an opening v68 therethrough in which the outer, rounded, end portion of the valve rod 29, is reciprocable, the pivot for the lever 611 being indicated at69. T he lever 6% is in the form ot .a triggerf'device having a depending linger-grip portion 70 which projects downwardly through a slot 71 in ashell 72 surrounding the body member 10 andthe disk 4l() and held in place thereon by the screw (iQ-toriniirg the pivot for the lever- 6i. rlhe lever 64 is formed with a nose-portion 7 which directly opposes the rounded outer end ot the valve rod.29,andis formed with a camsurtace 74 adapted to vvride against. the outer end of this rod and force the` latter tothe -lei't in'Figs. 1, 2 `and to open the valve 28againsttheresistance ot the springvcooperating therewith,.when the lever 6e is rockedin clockwise direction inzFig. 2. This cam so shaped'` that when the lever 64 is in the` position shown iii-Fig. 2 the valve is closed and when. this lever is rocked in clockwise. direction to extreme position this valve is inopen or abnormal rlhe .cam-surface .74, beyond Vits is Vso formed that :when the `lever 6i is moved to aposition to open the valve 28 the pressure ot'v the. rodf29-against theedge ofthe nose 7 tprevents reverse rock-ing` oi the lever 64- when the operator discontinues .pressure -on the linger `grip 7(7). ln v.the particular arrangement chown this result is accomplished by Aforming they edge of t-henose, beyond the highest part 75. et the cam, with a recess 76 which receives the rounded. end ot the valve rod v29 at the end et the valve-opening movement. the end wall 77 ot this yrecess forming a stop, cooperating with the rounded end. of this valve. rod to retain the trigger' lever 64 in set or valve open position.

lnasmuch as the shell 72` ispreiterably. of

`.relatively thin metal and repeated striking of the lever 64C against 'the end .wall 7S of' the slot 7l would batter thel shell and tend to loosen it, I provide means whereby the lever 64 when turned in counterclockwise direction by the operator to permit the valve 28 to close, will not strike this end wall, but

Will strike a part which will not be damaged by the impact, it being understood t-liat when the operator trips the lever (Sii to permit the valve 2B to close, the lever tfl, due to the high pressure of the oxygen against the valve 28 and tending to close the latter, will be forcibly rotated in counterclockwise direction. The means shown for the purpose above stated comprise a shoulder 79 on the nose T3 of the lever beyond Vthe lowest point 8() of the cam, this shoulder, which strikes the rounded end of the valve rod 29, being so disposed that the lever G4- cannot strike the wall 78 of the slot. i

Vifliiie I have illustrated and described a particular construction showing the preferred forms of embodiment of my improvements, I do not wish to 'be understood as intending to limit my inventionv thereto, as the same may be variously modified and altered without departing from th'cspirit ofy iiiy invention.

Vfhat I claim as new and desire to secure by Letters Patent, is t,v y

l. In combination, a Valve device comprising' a reciprocable valve proper having a stein, a pivotally supported lever for operating said valve comprising a cam portion for engaging' said stem and provided with means at the opposite ends of said cam portion adapted to engage said stem and opcrate as stops, and a spring yieldingly forcing said stem against said cam portion.

2. In combination, a valve device comprising a reciprocable valveV proper having a stem, a pivotally supported lever for operating said valve comprising a camportion for engaging said stem and having a stop portion at one end of said cam portion adapted to engage said stem and limit ro tation of said lever in one direction and a stop at the other end of the cam portion adapted to engage said stem and limit the rotation of said lever when reverselyV rotat-ed.

3. In a gas-burning device comprising a fluid-passage-equipped member, a shell sui'- rounding said member and containing a slot, and a valve controlling said passage and yieldingly forced in one direction, means for controlling said valve comprising a pivoted lever extending throughsaid slot and provided with a stop-forming` portion operating to prevent said lever from striking the end wall of said slot.

'4. In a gas-burning device comprising a fliiid-passage-equipped member, a shell surrounding said member and containing a slot, and a valve controlling said passage and yieldingly forced in one direction, means for pivoted lever extending through said slot and provided with a stop-forming portion adapted to engage said valve and operating to prevent said lever from striking the end wall of said slot.

6. In a gas-burning device comprising a iiuidpassage-equipped member, a shell surrounding said member and containing a slot, and a valve controlling said passage and vyielding-ly forced in one direction, means for controlling said valve con'iprising a pivoted lever extending through said slot- `and having a cam surface for engaging said valve, said'lever having a stop-forming portion adapted to engage said valve and operating to prevent said ever from striking the end wall of said slot.l

7. In a gas-burning device comprising a iuid-passage-equipped ineinb'er,a shell surrounding said member aiid containing a slot, and a valve controlling said passage and yieldingly forced in one direction, means forv controlling said valve comprising a pivoted lever extending through said slot and having a cam surface for engaging said valve, said lever having a stop at the lowest portion of said cam surface operating to prevent said lever from striking the end wall of said slot.

8. In a gas-burning device comprising a Huid-passage-equipped member, a shell surrounding said member and containing' a slot', and a valve controlling said passage and adapted to be yieldingly forced in one direction, means for controlling said valve coinprising a pivoted lever extending through said slot and having a cam surface for engaging said valve, said lever having a stop at the lowest portion of said cam surface adapted to engage said valve and operating to prevent said lever from striking the end wall of said slot.

9. In a gas-burning device comprising a 4fluid-passage-equipped memberrand a valve controlling said passage and adapted to be yieldingly forced in one direction, means for controlling said valve comprising a pivoted lever having av cam surface adapted to engage said valve and force it out of normal position and to a set position and a surface beyond the highest point of said cam so shaped as to maintain said lever in its abnormal or set position and a stop portion on said lever adapted to engage said stem and limit the rocking of said lever to a position in which said last-reerred-,to surface and the cam surta-ce move out or' engagement with said valve.

l0. ln a gas-burningY ,device comprising` a liuitl-passage-eqnipped member, and a valve controlling,` saidpassage and adapted to be yieldingly toi-eed in one direction, means tor Controlling said valve Comprising a pivoted lever having a cam surface adapted toengage said valve and force it out of normal position and a surface beyond the highest point, oic said eam so shaped as to maintain said lever in its position 'for holding the valve in its abnormal or set position `and a stop portion on said lever adapted to engage said valve and limit the rocking of said lever to a position in Which said last-reiterred-to surface' and the Cam surface move out ot' engagement with said valve.

ll. ln a, gas-lmrning` device comprising a fluid-ptissage-equipped member, and a valve controlling` saidpassagge and adapted to be yieldingly forced in one direction, means for controlling said valve eomprising a pivoted lever havingl a cam rsnrtaee adapted to engage said valve and force it ont or normal position and a surface bevond the highest point of said cam so shaped as to maintain said lever in its position for holding` the valve in its abnormal or set position, said lever containing' a valve-reeeivingl recess beyond the lowest part oi said Cam operating to limit the rocking of said lever in the direetion for permitting the movement ot said valve yto normalposition.`

l2. In a gas-burning device comprising a ilnid-passageeqnipped member, a shell snrronndingsaid member and containing a slot and a valve controlling said passage and adapted to be vieldinglv forced in one direction and into its abnormal position, mea-ns for eontrolling said valve Comprising a pivoted trigger-lever extending; 'through said 4slot7 said lever having a cam surface for engaging; said valve for moving the latter in opposition to the force tending to hold said Avalve in its normal position, said lever being' provided the lowest portion oi" l d valve ancL prevent said lever from strik- Vthe end Wall of said slot, said lever adaeent the highest portion of its cam Conning a reeess adapted to receive said valve limit ing .of said lever and vie/ldi said lever in its position tor 'the valve in its abnormal or set GEORGE A. llOlliRlSGN.

said eanrwith a shoulder adapted to engage 

